Metal recovery process
CA 2000463 A1 · Owner: Fricker, Alan Geoffrey · Inventors: Fricker, Alan Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the recovery of a valuable metal(s) from its ore(s), that includes a method for removal of environmentally hazardous volatile material, prior to the removal of the metal(s) from its ore pulp or liquor carrier. The process comprises forming a pulp of particles of the ore(s) and leaching from that pulp the valuable metal component via the formation of soluble metal complexes. As elements of the leaching chemicals used are often volatile at least the liquor component of the metal containing pulp is contacted by flow of gas to remove any volatile content. In the case of the leaching chemicals volatile elements the recycling of the volatile element to …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 11, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.